/* ============================================
   LUNA WHALE ART LAB — Shared Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons+Round');

/* ─── Design Tokens ─── */
:root {
    /* Colors */
    --bg-primary: #0a0f1e;
    --bg-secondary: #111827;
    --bg-card: #1a2237;
    --bg-card-hover: #1f2a42;
    --bg-overlay: rgba(10, 15, 30, 0.85);

    --accent-gold: #C9A96E;
    --accent-gold-light: #E8C99A;
    --accent-gold-dim: #8a7048;
    --accent-blue: #4F8EF7;
    --accent-teal: #2DD4BF;
    --danger: #F05252;
    --success: #22c55e;

    --text-primary: #F0EDE8;
    --text-secondary: #9BA4B5;
    --text-muted: #5A677D;
    --text-on-accent: #0a0f1e;

    --border-subtle: rgba(201, 169, 110, 0.15);
    --border-card: rgba(255, 255, 255, 0.07);
    --border-focus: rgba(201, 169, 110, 0.5);

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 24px rgba(201, 169, 110, 0.18);

    /* Gradients */
    --grad-accent: linear-gradient(135deg, #C9A96E 0%, #E8C99A 100%);
    --grad-dark: linear-gradient(180deg, #111827 0%, #0a0f1e 100%);
    --grad-card: linear-gradient(180deg, transparent 50%, rgba(10, 15, 30, 0.95) 100%);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 40px;
    --space-2xl: 64px;

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-md: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Nav heights */
    --sidebar-width: 72px;
    --mobile-nav-h: 66px;
    --header-h: 64px;
}

/* ─── Reset & Base ─── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans KR', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

input,
textarea,
select {
    font-family: inherit;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    outline: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

/* Ensure text visibility in various contexts */
.light input, .light textarea, .light select {
    color: #1a202c; /* Dark text for light mode */
}

.dark input, .dark textarea, .dark select {
    color: #f7fafc; /* Light text for dark mode */
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.1);
}

img {
    display: block;
    max-width: 100%;
}

ul,
ol {
    list-style: none;
}

/* ─── Typography ─── */
h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    line-height: 1.2;
}

h2 {
    font-size: clamp(1.3rem, 3vw, 2rem);
    font-weight: 600;
    line-height: 1.3;
}

h3 {
    font-size: clamp(1.05rem, 2vw, 1.35rem);
    font-weight: 600;
}

h4 {
    font-size: 1rem;
    font-weight: 600;
}

p {
    color: var(--text-secondary);
}

.text-accent {
    color: var(--accent-gold);
}

.text-muted {
    color: var(--text-muted);
}

.text-sm {
    font-size: 0.85rem;
}

.text-xs {
    font-size: 0.75rem;
}

.font-bold {
    font-weight: 700;
}

/* ─── Layout Wrappers ─── */
.app-shell {
    display: flex;
    min-height: 100vh;
}

/* Desktop sidebar layout */
.page-with-sidebar .main-area {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    padding-bottom: 0;
}

/* Mobile layout */
.page-mobile .main-area {
    padding-bottom: var(--mobile-nav-h);
}

.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ─── Left Sidebar (Desktop) ─── */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md) 0;
    z-index: 1000;
    gap: 4px;
}

.sidebar .logo-wrap {
    width: 42px;
    height: 42px;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar .logo-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.sidebar .nav-item {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
    color: var(--text-muted);
    font-size: 0.55rem;
    font-weight: 600;
    gap: 2px;
    text-align: center;
    position: relative;
}

.sidebar .nav-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.sidebar .nav-item.active {
    background: rgba(201, 169, 110, 0.15);
    color: var(--accent-gold);
}

.sidebar .nav-item .material-icons-round {
    font-size: 22px;
}

.sidebar .nav-item span.label {
    display: none;
}

.sidebar .nav-spacer {
    flex: 1;
}

/* ─── Mobile Bottom Nav ─── */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--mobile-nav-h);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    z-index: 1000;
    padding: 0 var(--space-md);
    align-items: center;
    justify-content: space-around;
    backdrop-filter: blur(12px);
}

.mobile-nav .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.6rem;
    font-weight: 600;
    transition: color var(--transition-fast);
    border-radius: var(--radius-md);
    min-width: 48px;
}

.mobile-nav .nav-item .material-icons-round {
    font-size: 24px;
}

.mobile-nav .nav-item.active {
    color: var(--accent-gold);
}

.mobile-nav .nav-item:hover {
    color: var(--text-primary);
}

/* ─── Top Header ─── */
.top-header {
    height: var(--header-h);
    position: sticky;
    top: 0;
    z-index: 900;
    background: rgba(17, 24, 39, 0.9);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 0 var(--space-lg);
}

.top-header .page-title {
    font-size: 1.1rem;
    font-weight: 700;
    white-space: nowrap;
}

.top-header .header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 700;
}

.top-header .header-logo img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.top-header .search-wrap {
    flex: 1;
}

/* ─── Search Bar ─── */
.search-bar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-full);
    padding: 10px var(--space-md);
    transition: border-color var(--transition-fast);
}

.search-bar:focus-within {
    border-color: var(--border-focus);
}

.search-bar .material-icons-round {
    color: var(--text-muted);
    font-size: 20px;
}

.search-bar input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    border-radius: 0;
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

/* ─── Avatar / Profile Badge ─── */
.avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--grad-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-on-accent);
    cursor: pointer;
    flex-shrink: 0;
    overflow: hidden;
    border: 2px solid var(--border-subtle);
    transition: border-color var(--transition-fast);
}

.avatar:hover {
    border-color: var(--accent-gold);
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px var(--space-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    cursor: pointer;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--grad-accent);
    color: var(--text-on-accent);
    box-shadow: 0 2px 12px rgba(201, 169, 110, 0.35);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(201, 169, 110, 0.45);
}

.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-focus);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.btn-danger {
    background: rgba(240, 82, 82, 0.15);
    color: var(--danger);
    border: 1px solid rgba(240, 82, 82, 0.3);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

.btn .material-icons-round {
    font-size: 18px;
}

/* ─── Cards ─── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-md), box-shadow var(--transition-md), border-color var(--transition-md);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: var(--border-subtle);
}

.card-body {
    padding: var(--space-md);
}

.card-img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

/* ─── Masonry / Gallery Grid ─── */
.masonry-grid {
    columns: 5 220px;
    column-gap: var(--space-md);
    padding: var(--space-md);
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: var(--space-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    transition: transform var(--transition-md), box-shadow var(--transition-md);
}

.masonry-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.masonry-item img {
    width: 100%;
    height: auto;
    display: block;
}

.masonry-item .item-overlay {
    position: absolute;
    inset: 0;
    background: var(--grad-card);
    opacity: 0;
    transition: opacity var(--transition-md);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-md);
}

.masonry-item:hover .item-overlay {
    opacity: 1;
}

.masonry-item .item-actions {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    display: flex;
    gap: var(--space-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.masonry-item:hover .item-actions {
    opacity: 1;
}

.masonry-item .item-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: white;
}

.masonry-item .item-subtitle {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ─── Icon Button ─── */
.icon-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    color: white;
    transition: background var(--transition-fast);
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.icon-btn .material-icons-round {
    font-size: 16px;
}

/* ─── Pills / Tags ─── */
.pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.pill:hover {
    border-color: var(--border-focus);
    color: var(--text-primary);
}

.pill.active {
    background: rgba(201, 169, 110, 0.15);
    border-color: var(--accent-gold-dim);
    color: var(--accent-gold);
}

/* ─── Form Elements ─── */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-input {
    padding: 12px var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    border-color: var(--border-focus);
}

.form-input::placeholder {
    color: var(--text-muted);
}

textarea.form-input {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

/* ─── Badge ─── */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
}

.badge-gold {
    background: rgba(201, 169, 110, 0.2);
    color: var(--accent-gold);
    border: 1px solid var(--border-subtle);
}

.badge-blue {
    background: rgba(79, 142, 247, 0.15);
    color: var(--accent-blue);
}

.badge-success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
}

.badge-danger {
    background: rgba(240, 82, 82, 0.15);
    color: var(--danger);
}

/* ─── Divider ─── */
.divider {
    height: 1px;
    background: var(--border-subtle);
    margin: var(--space-lg) 0;
}

.divider-text {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.divider-text::before,
.divider-text::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-subtle);
}

/* ─── Upload Zone ─── */
.upload-zone {
    border: 2px dashed var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-md);
    background: var(--bg-card);
    min-height: 180px;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent-gold);
    background: rgba(201, 169, 110, 0.05);
}

.upload-zone .material-icons-round {
    font-size: 42px;
    color: var(--accent-gold-dim);
}

.upload-zone p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.upload-zone strong {
    color: var(--accent-gold);
}

/* ─── Section Header ─── */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.section-header h2 {
    margin: 0;
}

.section-header .see-all {
    font-size: 0.85rem;
    color: var(--accent-gold);
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.section-header .see-all:hover {
    opacity: 0.75;
}

/* ─── Progress Bar ─── */
.progress-bar-wrap {
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    height: 6px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--grad-accent);
    transition: width 0.6s ease;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card-hover);
    border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-gold-dim);
}

/* ─── Utilities ─── */
.flex {
    display: flex;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

.mt-sm {
    margin-top: var(--space-sm);
}

.mt-md {
    margin-top: var(--space-md);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.p-md {
    padding: var(--space-md);
}

.p-lg {
    padding: var(--space-lg);
}

.w-full {
    width: 100%;
}

.rounded-full {
    border-radius: var(--radius-full);
}

.hidden {
    display: none !important;
}

.opacity-0 {
    opacity: 0;
}

/* ─── Responsive Breakpoints ─── */
@media (min-width: 769px) {
    .sidebar {
        display: flex;
    }

    .mobile-nav {
        display: none !important;
    }

    .hide-desktop {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .sidebar {
        display: none !important;
    }

    .mobile-nav {
        display: flex;
    }

    .page-with-sidebar .main-area {
        margin-left: 0;
    }

    .hide-mobile {
        display: none !important;
    }

    .masonry-grid {
        columns: 2 160px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    :root {
        --space-lg: 16px;
        --header-h: 56px;
    }
}

@media (max-width: 480px) {
    .masonry-grid {
        columns: 2 140px;
        gap: var(--space-sm);
    }

    .top-header {
        padding: 0 var(--space-md);
    }
}

/* ─── Page Transitions ─── */
.page-fade {
    animation: pageFade 0.3s ease;
}

@keyframes pageFade {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Toast Notifications ─── */
.toast-container {
    position: fixed;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    pointer-events: none;
}

@media (min-width: 769px) {
    .toast-container {
        bottom: var(--space-lg);
    }
}

.toast {
    padding: 12px var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-card);
    white-space: nowrap;
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

/* ─── Auth Pages ─── */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at 60% 30%, rgba(201, 169, 110, 0.08) 0%, transparent 70%),
        var(--bg-primary);
    padding: var(--space-lg);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-xl) var(--space-xl);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.auth-logo img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.auth-logo-text {
    line-height: 1.1;
}

.auth-logo-text .brand {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
}

.auth-logo-text .sub {
    font-size: 0.75rem;
    color: var(--accent-gold);
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.custom-scrollbar::-webkit-scrollbar {
    width: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
}

.custom-scrollbar:hover::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
}

.dark .custom-scrollbar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.dark .custom-scrollbar:hover::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
}